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kichikuou
b155b4b79f
This adds a new parameter `blend` to `gfx_draw_glyph()`. When `blend` is true, the function performs normal alpha blending (same as `gfx_draw_glyph_to_pmap()`). If `blend` is false, the resulting pixel color will be the text color and the alpha value will be copied from the glyph texture. However, if the alpha value is less than 0.01, the pixel will not be written. If you are drawing on a transparent texture (which will later be blended into another texture), `blend` should be false. If you are drawing on top of an image, `blend` should be true. `gfx_draw_glyph()` used to fill transparent pixels with text color, but this step is no longer needed and has been removed.
178 lines
11 KiB
C
178 lines
11 KiB
C
/* Copyright (C) 2019 Nunuhara Cabbage <nunuhara@haniwa.technology>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://gnu.org/licenses/>.
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*/
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#ifndef SYSTEM4_GFX_CORE_H
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#define SYSTEM4_GFX_CORE_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <SDL.h>
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#include "gfx/gl.h"
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#include "gfx/types.h"
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struct cg;
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struct text_metrics;
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enum cg_type;
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enum draw_method {
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DRAW_METHOD_NORMAL,
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DRAW_METHOD_SCREEN,
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DRAW_METHOD_MULTIPLY,
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DRAW_METHOD_ADDITIVE,
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};
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typedef struct texture {
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GLuint handle;
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mat4 world_transform;
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int w, h;
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} Texture;
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struct gfx_render_job;
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typedef struct shader {
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GLuint program;
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// variables
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GLuint world_transform;
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GLuint view_transform;
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GLuint texture;
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GLuint vertex;
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void (*prepare)(struct gfx_render_job *, void *);
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} Shader;
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enum gfx_shape {
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GFX_RECTANGLE,
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GFX_LINE,
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};
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struct gfx_render_job {
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struct shader *shader;
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enum gfx_shape shape;
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GLuint texture;
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GLfloat *world_transform;
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GLfloat *view_transform;
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void *data;
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};
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int gfx_init(void);
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void gfx_fini(void);
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Texture *gfx_main_surface(void);
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void gfx_set_window_logical_size(int w, int h);
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void gfx_update_screen_scale(void);
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void gfx_set_wait_vsync(bool wait);
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void gfx_load_shader(struct shader *dst, const char *vertex_shader_path, const char *fragment_shader_path);
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GLuint gfx_load_shader_file(const char *path, GLenum type);
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// rendering
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void gfx_set_clear_color(int r, int g, int b, int a);
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void gfx_clear(void);
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void gfx_swap(void);
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void gfx_prepare_job(struct gfx_render_job *job);
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void gfx_run_job(struct gfx_render_job *job);
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void gfx_render(struct gfx_render_job *job);
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void _gfx_render_texture(struct shader *s, struct texture *t, Rectangle *r, void *data);
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void gfx_render_texture(struct texture *t, Rectangle *r);
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// texture management
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void gfx_init_texture_blank(struct texture *t, int w, int h);
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void gfx_init_texture_with_cg(struct texture *t, struct cg *cg);
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void gfx_init_texture_rgba(struct texture *t, int w, int h, SDL_Color color);
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void gfx_init_texture_rgb(struct texture *t, int w, int h, SDL_Color color);
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void gfx_init_texture_with_pixels(struct texture *t, int w, int h, void *pixels);
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void gfx_init_texture_amap(struct texture *t, int w, int h, uint8_t *amap, SDL_Color color);
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void gfx_init_texture_rmap(struct texture *t, int w, int h, uint8_t *rmap);
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void gfx_update_texture_with_pixels(struct texture *t, void *pixels);
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void gfx_copy_main_surface(struct texture *dst);
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void gfx_delete_texture(struct texture *t);
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GLuint gfx_set_framebuffer(GLenum target, Texture *t, int x, int y, int w, int h);
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void gfx_reset_framebuffer(GLenum target, GLuint fbo);
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SDL_Color gfx_get_pixel(Texture *t, int x, int y);
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void *gfx_get_pixels(Texture *t);
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int gfx_save_texture(Texture *t, const char *path, enum cg_type);
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// drawing
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void gfx_draw_init(void);
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void gfx_copy(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_bright(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int rate);
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void gfx_copy_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_sprite(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, SDL_Color color);
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void gfx_sprite_copy_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int alpha_key);
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void gfx_copy_color_reverse(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_use_amap_under(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int threshold);
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void gfx_copy_use_amap_border(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int threshold);
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void gfx_copy_amap_max(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_copy_amap_min(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_blend(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int a);
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void gfx_blend_src_bright(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int a, int rate);
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void gfx_blend_add_satur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_blend_amap(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_blend_amap_src_only(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_blend_amap_color(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int r, int g, int b);
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void gfx_blend_amap_color_alpha(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int r, int g, int b, int a);
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void gfx_blend_amap_alpha(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h, int a);
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void gfx_blend_amap_bright(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int rate);
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void gfx_blend_amap_alpha_src_bright(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int alpha, int rate);
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void gfx_blend_use_amap_color(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int r, int g, int b, int rate);
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void gfx_blend_screen(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_blend_multiply(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_blend_screen_alpha(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int a);
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void gfx_fill(struct texture *dst, int x, int y, int w, int h, int r, int g, int b);
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void gfx_fill_alpha_color(struct texture *dst, int x, int y, int w, int h, int r, int g, int b, int a);
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void gfx_fill_amap(struct texture *dst, int x, int y, int w, int h, int a);
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void gfx_fill_amap_over_border(Texture *dst, int x, int y, int w, int h, int alpha, int border);
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void gfx_fill_amap_under_border(Texture *dst, int x, int y, int w, int h, int alpha, int border);
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void gfx_fill_amap_gradation_ud(Texture *dst, int x, int y, int w, int h, int up_a, int down_a);
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void gfx_fill_screen(Texture *dst, int x, int y, int w, int h, int r, int g, int b);
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void gfx_fill_multiply(Texture *dst, int x, int y, int w, int h, int r, int g, int b);
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void gfx_satur_dp_dpxsa(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_screen_da_daxsa(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_add_da_daxsa(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_blend_da_daxsa(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_sub_da_daxsa(struct texture *dst, int dx, int dy, struct texture *src, int sx, int sy, int w, int h);
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void gfx_bright_dest_only(Texture *dst, int x, int y, int w, int h, int rate);
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void gfx_copy_stretch(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_stretch_amap(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_stretch_blend(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh, int a);
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void gfx_copy_stretch_blend_amap(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_stretch_blend_amap_alpha(struct texture *dst, int dx, int dy, int dw, int dh, struct texture *src, int sx, int sy, int sw, int sh, int a);
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void gfx_copy_rot_zoom(Texture *dst, Texture *src, int sx, int sy, int w, int h, float rotate, float mag);
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void gfx_copy_rot_zoom_amap(Texture *dst, Texture *src, int sx, int sy, int w, int h, float rotate, float mag);
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void gfx_copy_rot_zoom_use_amap(Texture *dst, Texture *src, int sx, int sy, int w, int h, float rotate, float mag);
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void gfx_copy_root_zoom2(Texture *dst, float cx, float cy, Texture *src, float scx, float scy, float rot, float mag);
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void gfx_copy_reverse_LR(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_copy_reverse_UD(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_copy_reverse_amap_LR(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_copy_rotate_y(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_rotate_y_use_amap(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_rotate_x(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_rotate_x_use_amap(Texture *dst, Texture *front, Texture *back, int sx, int sy, int w, int h, float rot, float mag);
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void gfx_copy_width_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_height_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_amap_width_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_amap_height_blur(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h, int blur);
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void gfx_copy_with_alpha_map(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_fill_with_alpha(Texture *dst, int x, int y, int w, int h, int r, int g, int b, int a);
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void gfx_copy_stretch_with_alpha_map(Texture *dst, int dx, int dy, int dw, int dh, Texture *src, int sx, int sy, int sw, int sh);
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void gfx_copy_grayscale(Texture *dst, int dx, int dy, Texture *src, int sx, int sy, int w, int h);
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void gfx_draw_line(Texture *dst, int x0, int y0, int x1, int y1, int r, int g, int b);
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void gfx_draw_line_to_amap(Texture *dst, int x0, int y0, int x1, int y1, int a);
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void gfx_draw_glyph(Texture *dst, float dx, int dy, Texture *glyph, SDL_Color color, float scale_x, float bold_width, bool blend);
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void gfx_draw_glyph_to_pmap(Texture *dst, float dx, int dy, Texture *glyph, Rectangle glyph_pos, SDL_Color color, float scale_x);
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void gfx_draw_glyph_to_amap(Texture *dst, float dx, int dy, Texture *glyph, Rectangle glyph_pos, float scale_x);
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#endif /* SYSTEM4_SDL_CORE_H */
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